92 Report of State Board of Horticulture. 



SPRAY FORMULAS. 



REQUISITES FOR SUCCESSFUL SPRAYING. 



Materials of standard strength, carefully compounded, ap- 

 plied in thorough manner at regular intervals. Fruit thinned 

 so that the spray liquid can reach every portion of that re- 

 maining on the tree. 



INSECTICIDES. 



Used for codling moth larvae, caterpillars, slugs, and all 

 biting and chewing insects. 



SPRAY NO. 1— ARSENITE OF SODA. 



1 pound of white arsenic. 



2 pounds of sal soda.* 

 1 gallon of water. 



Directions — Boil fifteen minutes, add amount of water equal 

 to that evaporated, giving one gallon of arsenite of soda. For 

 fifty gallons of water use one and a half pints of the arsenite 

 of soda and six pounds of freshly slaked lime. Can be used 

 safely. 



SPRAY NO. 2-PARIS GREEN. 



1 pound paris green, 

 i pound quick lime. 

 200 gallons water. 



Slake the lime in part of the water, sprinkling in the paris 

 green gradually, then add the rest of the water. For the 

 peach and other tender-leaved plants use three hundred gal- 

 lons of water. Keep well stirred while syraying. 



SPRAY NO. 3— ARSENITE OF LIME. 



1 pound white arsenic. 



2 pounds fresh burned lime. 

 1 gallon water. 



* In Western Oregon, and moist sections, use three instead of two pounds of sal soda. 



